| Aconitum napellus | GB, VC41 Glamorganshire, Peterston-super-Ely | Arthur Langford Still | Botanical Exchange Club of The British Isles Edward Charles Wallace | 14/6/1935 | SLBI |
| Carex muricata subsp. pairae | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Job Edward Lousley | 19/6/1925 | SLBI |
| Chenopodium murale | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Arthur Langford Still | 26/6/1935 | SLBI |
| Polygala vulgaris | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 16/6/1935 | SLBI |
| Trifolium scabrum | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Edward Charles Wallace | 19/6/1925 | SLBI |
| Trifolium striatum | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Job Edward Lousley | 15/6/1905 | SLBI |
| Mentha pulegium | GB, VC41 Glamorganshire, Reynoldston | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 8/8/1934 | SLBI |
| Mentha suaveolens x longifolia = M. x rotundifolia | GB, VC45 Pembrokeshire, Manorbier | Joseph Donald Grose | Arthur Langford Still | 13/9/1937 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC46 Cardiganshire, Aberarth Cultivated | Arthur Langford Still | Job Edward Lousley | 6/8/1939 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC46 Cardiganshire, Aberarth Cultivated | Arthur Langford Still | | 6/8/1939 | SLBI |
| Carex dioica | GB, VC49 Caernarvonshire, Cwm Idwal | Arthur Langford Still | Robert MacKechnie | 25/6/1936 | E |
| Carex elata | GB, VC49 Caernarvonshire, Cwm-y-glo | Arthur Langford Still | Job Edward Lousley | 6/1936 | SLBI |
| Carex elata | GB, VC49 Caernarvonshire, Cwm-y-glo | Arthur Langford Still | Job Edward Lousley | 6/1936 | SLBI |
| Carex elata | GB, VC49 Caernarvonshire, Cwm-y-glo | Arthur Langford Still | Job Edward Lousley | 6/1936 | SLBI |
| Carex nigra | GB, VC49 Caernarvonshire, Cwm-y-glo | Arthur Langford Still | Job Edward Lousley | 6/1936 | SLBI |
| Carex nigra | GB, VC49 Caernarvonshire, Cwm-y-glo | Arthur Langford Still | Job Edward Lousley | 6/1936 | SLBI |
| Carex nigra | GB, VC49 Caernarvonshire, Cwm-y-glo | Arthur Langford Still | Job Edward Lousley | 11/6/1937 | SLBI |
| Carex nigra | GB, VC49 Caernarvonshire, Cwm-y-glo | Arthur Langford Still | Job Edward Lousley | 12/6/1937 | SLBI |
| Carex nigra | GB, VC49 Caernarvonshire, Cwm-y-glo | Arthur Langford Still | Job Edward Lousley | 12/6/1937 | SLBI |
| Hymenophyllum wilsonii | GB, VC49 Caernarvonshire, Dolbadarn Castle | Arthur Langford Still | Harold Stuart Thompson Edward Charles Wallace | 27/6/1936 | BIRM |
| Carex vesicaria | GB, VC49 Caernarvonshire, Llyn Padarn | Arthur Langford Still | Edward Charles Wallace | 9/6/1936 | E |
| Senecio vulgaris | GB, VC49 Caernarvonshire, Porthmadog | Arthur Langford Still | Job Edward Lousley | 6/1936 | SLBI |
| Carex muricata subsp. pairae | GB, VC52 Anglesey, Bodorgan | Arthur Langford Still | | 29/6/1936 | BM |
| Carex muricata subsp. pairae | GB, VC52 Anglesey, Bodorgan Station | Arthur Langford Still | Arthur Langford Still | 29/6/1936 | BM |
| Carex nigra | GB, VC52 Anglesey, Holyhead, Carreg Fawr | Arthur Langford Still | Job Edward Lousley | 6/1937 | SLBI |
| Carex nigra | GB, VC52 Anglesey, Holyhead, Carreg Fawr | Arthur Langford Still | Job Edward Lousley | 7/1937 | SLBI |
| Carex disticha | GB, VC52 Anglesey, Llyn Coron | Arthur Langford Still | Edward Charles Wallace Robert MacKechnie | 29/6/1936 | E |
| Carex muricata subsp. pairae | GB, VC52 Anglesey, Llyn Coron | Arthur Langford Still | Job Edward Lousley | 6/1936 | SLBI |
| Carex muricata subsp. pairae | GB, VC52 Anglesey, Llyn Coron | Arthur Langford Still | Job Edward Lousley | 6/1936 | SLBI |
| Ranunculus fluitans | GB, VC52 Anglesey, Llyn Coron | Arthur Langford Still | Job Edward Lousley | 6/1936 | SLBI |
| Trifolium striatum | GB, VC52 Anglesey, Porth Dafarch | Arthur Langford Still | Flora Britannica | 7/6/1937 | SLBI |
| Carex lasiocarpa | GB, VC52 Anglesey, Rhoscolyn | Arthur Langford Still | | 14/6/1937 | BM |
| Carex lasiocarpa | GB, VC52 Anglesey, Rhoscolyn | Arthur Langford Still | Robert MacKechnie | 14/6/1937 | E |
| Carex muricata subsp. pairae | GB, VC52 Anglesey, Rhoscolyn | Arthur Langford Still | | 14/6/1937 | BM |
| Atriplex | GB, VC52 Anglesey, Rhosneigr | Arthur Langford Still | | 24/6/1937 | SLBI |
| Carex muricata subsp. pairae | GB, VC52 Anglesey, South Stack | Arthur Langford Still | Arthur Langford Still | 6/1937 | BM |
| Carex flacca | GB, VC52 Anglesey, Trearddur Bay | Arthur Langford Still | Job Edward Lousley | 5/6/1937 | SLBI |
| Mentha aquatica | GB, East Yorkshire, Warthill | | Arthur Langford Still Harold Stuart Thompson | 9/1885 | BIRM |
| Mentha aquatica x spicata = M. x piperita var. crispa | GB, VC17 Surrey, Wallington Cultivated GB, VC70 Cumberland, Carlisle | Arthur Langford Still | Botanical Exchange Club of The British Isles | 10/8/1937 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC90 Angus, Brechin,Fern Den | Arthur Langford Still | | | SLBI |
| Mentha spicata | GB, VC90 Angus, Edzell,West Water | Arthur Langford Still | Job Edward Lousley | 20/8/1937 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC90 Angus, Fern Den | Arthur Langford Still | Job Edward Lousley | 20/8/1937 | SLBI |
| Mentha spicata | GB, VC90 Angus, Forfar | Arthur Langford Still | Job Edward Lousley | 21/8/1937 | SLBI |
| Mentha longifolia | GB, VC90 Angus, Glamis | Arthur Langford Still | | 19/8/1937 | SLBI |
| Mentha spicata | GB, VC90 Angus, Glamis | Arthur Langford Still | Botanical Exchange Club of The British Isles | 19/8/1937 | K |
| Mentha spicata | GB, VC90 Angus, Glamis | Arthur Langford Still | Botanical Exchange Club of The British Isles | 19/8/1937 | K |
| Mentha suaveolens x longifolia = M. x rotundifolia var. webberi | GB, VC90 Angus, Glamis | Arthur Langford Still Robert Henry Corstorphine | Edward Charles Wallace | 19/8/1937 | OXF |
| Mentha spicata | GB, Ambiguous locality (GB), Wallington Cultivated | Arthur Langford Still | Edward Charles Wallace | 8/1935 | SLBI |